DIN 2391-1-1981 特殊尺寸精度的精密无缝钢管.尺寸

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【英文标准名称】:Seamlessprecisionsteeltubes;Dimensions
【原文标准名称】:特殊尺寸精度的精密无缝钢管.尺寸
【标准号】:DIN2391-1-1981
【标准状态】:作废
【国别】:德国
【发布日期】:1981-07
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:钢;精密钢管;无缝管;钢管;管;公差;尺寸
【英文主题词】:tolerances(measurement);seamlesspipes;dimensions;steelpipes;pipes;steels;precisionsteeltubes
【摘要】:
【中国标准分类号】:H48
【国际标准分类号】:2710
【页数】:3P;A4
【正文语种】:德语


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【英文标准名称】:IEC61282-7OpticCommunicationSystemDesignGuides-Part7:StatisticalCalculationofChromaticDispersion
【原文标准名称】:IEC61282-7光学通信系统设计指南.第7部分:色散的统计计算
【标准号】:ANSI/TIATR-1028-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:TIA
【标准类型】:()
【标准水平】:()
【中文主题词】:光波导;数学计算;纤维光学;统计;通信系统;色分散;设计;数字信号;电信;模拟信号
【英文主题词】:Analoguesignals;Chromaticdispersion;Communicationsystems;Design;Digitalsignals;Fibreoptics;Mathematicalcalculations;Opticalwaveguides;Statistical;Telecommunications
【摘要】:Thisdocumentisaguidelineprovidingmethodsofrepresentingtheprocessstatisticsofthechromaticdispersionofopticalfibresandrelatedcomponentsthatmaybecombinedinalink
【中国标准分类号】:M33
【国际标准分类号】:33_180_01;03_120_30
【页数】:
【正文语种】:英语


【英文标准名称】:StandardTestMethodforDeterminationofYieldStressandApparentViscosityofEngineOilsatLowTemperature
【原文标准名称】:低温下发动机油的屈服应力和表观粘度用标准试验方法
【标准号】:ASTMD4684-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D02.07
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:低温;润滑剂;石油产品;试验;粘度;屈服应力
【英文主题词】:lowtemperatureflowproperties;lowtemperatureviscosity;mini-rotaryviscometer;pumpingviscosity;useddieselengineoil;viscosity;yieldstress;
【摘要】:1.1Thistestmethodcoversthemeasurementoftheyieldstressandviscosityofengineoilsaftercoolingatcontrolledratesoveraperiodexceeding45htoafinaltesttemperaturebetween-10and-40176;C.Theviscositymeasurementsaremadeatashearstressof525Paoverashearrateof0.4to15s-1.Theviscosityasmeasuredatthisshearstresswasfoundtoproducethebestcorrelationbetweenthetemperatureatwhichtheviscosityreachedacriticalvalueandborderlinepumpingfailuretemperatureinengines.1.2ProcedureAofthistestmethodhasprecisionstatedforayieldrangefromlessthan35Pato210Paandapparentviscosityrangefrom4300to270000mPas.Thetestprocedurecandeterminehigheryieldstressandviscositylevels.1.3Thistestmethodisapplicableforunusedoils,sometimesreferredtoasfreshoils,designedforbothlightdutyandheavydutyengineapplications.Italsohasbeenshowntobesuitableforuseddieselandgasolineengineoils.Theapplicabilitytopetroleumproductsotherthanengineoilshasnotbeendetermined.1.4ThistestmethodusesthemilliPascalsecond(m956;Pas)astheunitofviscosity.Forinformation,theequivalentunit,centiPoise(cP),isshowninparentheses.1.5Thistestmethodcontaintwoprocedures:ProcedureAincorporatesseveralequipmentandproceduralmodificationsfromTestMethodD4684-02thathaveshowntoimprovetheprecisionofthetest,whileProcedureBisunchangedfromTestMethodD4684-02.Additionally,ProcedureAappliestothoseinstrumentsthatutilizethermoelectriccoolingtechnologyandthosethatuseindirectrefrigerationtechnologyofrecentmanufactureforinstrumenttemperaturecontrol.ProcedureBcanusethesameinstrumentsusedinProcedureAorthosecooledbycirculatingmethanol.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E34
【国际标准分类号】:75_100;75_100
【页数】:13P.;A4
【正文语种】: